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VACUUM PRODUCTS CATALOG
▲
Intr
od
uc
tio
n
Mel SattlerProduction Manager
Thomas Dobler Sales Manager
Chris LongCFO
Ken HarrisonPresident & CEO
GNB is a company of technical experts serving other technology experts. Since our
beginning in 1968 it has been our commitment to technology that has set us apart.
During this time we have produced outstanding, innovative products that have met the
most demanding applications in areas such as temperature extremes, large sizes,
radiation levels, vacuum levels, vibration levels, and unique applications.
However GNB is more than just technology, we are passionate about building winning
relationships. It is our corporate vision that customers will be so impressed that they say,
“Wow! We want to do business with GNB again.”
Other vacuum product companies produce large catalogs and encourage customers to
design their systems around the standardized products. However, with GNB you can
have it your way. You can select a standard item or we will custom make one just the
way you want it. Consequently, GNB is no ordinary vacuum products company. This
brochure depicts a sampling of our most popular products, but it should be treated as an
idea book—not an exhaustive product catalog. No matter what your application is,
please give us a call; and we will gladly share our technical expertise.
04
Vacuum Gate Valves 12~17
Slit Valves 18
Angle Valves 19~20
Cryo Products
Primary Uses of Cryo Products 21
Conical-shaped Multi-coolant Baffles 24
Multi-coolant Baffles
25Liquid Nitrogen Traps
26
Chamber Products
Primary Uses of Chambers 27
Metallurgical Products and Applications 32
Engineering Consulting 33
Custom Servicesand Manufacturing
34
Ordering Information 35
GNB Sealing Mechanism 05
Gate Valve Specification 06
Angle Valve Specification 07
Special Valves 09
Selenium Traps 24
UHV Chambers 28
HV Chambers 29
Pressure Vessels 31
Rough Vacuum Chambers 30
Custom Products
Vacuum Valve Products
Primary Uses of Valves
VacuumValves
Vacuum Valve Product Family
4800-398-8470
The product families in this section are: Gate Valves, Slit Valves, Angle Valves
and Special Valves
Primary Uses of Valves
Vacuum gate valves are used to seal against the forces that are caused by atmospheric
pressure. Some can also be used to hold small amounts of over-pressure such as an
inert atmosphere for processing or quenching. Some of the common applications are
door valves, pump isolation valves, process isolation valves, throttling valves and
roughing/venting valves.
Door valves are used in place of a lid or a door into a vacuum system. Only one side is
attached to the vacuum chamber and the other side is open to the atmosphere, thus the
sealing force can only be in one direction. They are used as an access point or to
introduce or remove products into the vacuum chamber.
Pump isolation valves are normally used to isolate the vacuum pumps from the
process. Some pumps can only run at lower vacuum levels and others can only be run
at higher vacuum levels. These valves will seal the pump from the process, so they can
stay within their operating pressure range. Cryopumps need to undergo a process
called regeneration. This must be performed periodically in order for the pumping
surfaces to be cleaned of the buildup of frozen gas molecules. To perform this process,
the pump must be sealed from the rest of the vacuum system. Pump isolation valves
are sometimes called basement valves because they are a part of the facilities that
accompany a vacuum system. Most pump isolation valves must be able to seal with the
differential pressure in either direction. The chamber can be held under vacuum while
the pump is vented, or the pump can be held under vacuum while the chamber is
vented. Pump isolation valves can also be used to isolate many other types of
equipment such as temperature probes and residual gas analyzers—any item that is
sometimes part of the process and sometimes removed from the process can be
isolated by these valves.
Process isolation valves are used for in-line processes where more than one vacuum
chamber is connected. These valves seal between parts of the vacuum system and
isolate one section from another. For example, a loadlock chamber is used to introduce
parts into a vacuum system. While the main vacuum chamber is under vacuum, the
loadlock chamber is at atmospheric pressure. After the parts are loaded into the
loadlock chamber, it is pumped down to be at a pressure that is near the main chamber.
Then the isolation valve between the loadlock and the main chamber is opened, so the
parts can be moved into the main chamber. The reverse of this process is used to
remove parts from the process without venting the main chamber.
Throttling valves are valves that can stop in a position other than fully open and fully
closed. Some have a set number of predetermined positions and others are full
www.gnbvac.com5
Vacuum Valve Product Family
VacuumValves
throttling valves where the valve gate can stop in an infinite number of positions. The
most common use for a throttling valve is to vary the pumping speed so that a set
pressure or special atmosphere can be maintained within the vacuum chamber.
The GNB Sealing Mechanism
Most gate valves that GNB manufactures use a cam-over sealing mechanism. The
gate (sealing plate) in the valve moves back and forth in the valve body from the open
position to the closed position. Wheels on the gate keep it away from the body until the
gate is ready to seal. When the gate reaches the end of its stroke and is ready to seal,
there is an extra space which will allow the gate wheels to move toward the sealing
surface. At the same time, a second set of rollers on the gate contact a stop which will
only allow the gate to move toward the seal.
The gate is connected to another part called a carriage by a series of links. The
carriage has side rollers that guide its movement in the valve body. It also has reaction
rollers that press against the opposite side of the valve body to provide the force to seal
the gate.
Roughing valves are made to open and close while there is full differential pressure
across them. They can be used to vent a chamber or to equalize the pressure between
two chambers. They are called roughing valves because they are often used in the
rough vacuum lines in a pumping system.
Gate Valves
GNB’s gate valves are designed to be highly
reliable in harsh environments. Some of
the unique features of the GNB valves are:
· The valves can open with adifferential pressure across the gate of 1 Torr (1.3 mbar)
· No internal lubricants
· Low maintenance
· No internal springs
· Simple adjustment of the
gate O-ring compression
VacuumValves
6
When the movement of the gate is stopped at the travel limit, the carriage continues to
move because the actuator is attached to the carriage. The links between the carriage
and the gate now rotate until they are perpendicular with the gate. This creates a
powerful sealing force directly from one side of the valve body to the other.
All movements are controlled mechanically and there are no springs to retract the gate during
opening. This is one of the most effective and reliable gate sealing mechanisms that has
been designed. There are no lubricated parts such as balls that need to roll up a ramp.
Specifications that are common to all of GNB’s gate valves are:
Specification Standard Features Options
Leak Rate <1x10-9 std cc/sec He -
Vacuum Rating 1x10-8 Torr (1.3x10-8 mbar) UHV
Operating Temperature 400 °F (200°C) High Temperature
Mounting Position Any -
Required Air Pressure 80-120 psig (5.5-8.3 bar) -
Solenoid Voltage 24VDC 110VAC, 220VAC
Material 304L Stainless Steel 316L Stainless Steel, Mild Steel, Aluminum
Surface Finish Bead Blasted #4 Grained, E-polished, Painted
Position Indicators Reed Switches Mechanical Switches
Type of Seals O-rings at Gate, Bonnet and Shaft Feed Through
Metal Seals at Bonnet and Bellows
Sealing Material Viton A (FKM) Buna, Silicon, FFKM
Lock Out/Tag Out None Gate Lock Mechanism
Vacuum Valve Product Family
800-398-8470
www.gnbvac.com7
Vacuum Valve Product Family
VacuumValves
Direct Linear Gate Valves
GNB manufactures a full range of direct linear gate valves where there is no motion
multiplier between the pneumatic cylinder and the carriage. These have a larger foot
print than the Space Saver valves, but have fewer moving parts. They offer outstanding
performance for industrial applications and operate well in contaminated environments.
Common sizes are ISO 100 to ISO 1320 and ASA 4 inches to ASA 52 inches. These
can easily be customized with many options including additional ports, water cooling,
protective metal guardrings (PMG) and bodies that are split in the middle.
Specifications for the direct linear valves, including PMG valves, are as follows:
Direct Linear Valve Standard Features Options
Sealing Differential 1.5 atm in Either Direction -
Actuation Air to Open, Air to Close Hydraulic, Electric
Shaft Sealing Dual O-ring, 100,000 Cycles Before service*
Edge Welded Bellows, 1 Million Cycles*
Lubrication Krytox Grease at Shaft Feedthrough Silicone, Apiezon
Service Life Mechanism Designed for 2 Million Cycles
-
Lock Out/Tag Out None Gate Lock Mechanism
Water-Cooling None Gate, Flanges, Body, Guard ring
Differential Pressure at Opening 1 Torr (1.3 mbar) 760 Torr (1 bar)
*Under Clean Vacuum Conditions
Space Saver Gate Valves
GNB Space Saver gate valves are designed to minimize size—both in overall length and in the
flange-to-flange distance. They come standard with an edge welded bellows for the actuator
feedthrough.
Specification Standard Features Options
Sealing Differential 1.5 atm in Either Direction -
Actuation Air to Open Air to Close -
Shaft Sealing AM-350 Bellows Dual O-ring
Lubrication None Silicone or Krytox if Dual O-ring Shaft Seal
Service Life Bellows Rated for 1 Million Cycles*
-
Differential Pressure at Opening
1 Torr (1.3 mbar) 760 Torr (1 bar)
*Under Clean Vacuum Conditions
Vacuum Valve Product Family
VacuumValves
8800-398-8470
Slit Valves
Slit valves are often used as door valves or as process isolation valves.
Sometimes they are called a transfer valve because they can be used to seal
between two vacuum chambers and then open to have product transferred from
one chamber to the next. In-line systems and cluster systems typically use
rectangular (slit) valves. The most common material for these valves is aluminum;
however, stainless steel and mild steel can also be used.
Angle Valves
Angle valves are also called poppet valves. Generally they are less expensive than
gate valves, but because the flow path must turn a corner, they have lower conductance
than gate valves. They have few moving parts and are well suited for dirty and
contaminated environments. Smaller sizes (below 20 inches in diameter) can be
designed to open and close against full differential pressure. This makes them ideal for
the roughing lines in vacuum system.
Because angle valves are simple and direct, they can open and close quickly—
sometimes in a fraction of a second. For this reason they are often used when rapid
opening and closing is desirable.
Some angle valves are used in conjunction with diffusion pumps. Because a diffusion
pump must be oriented so that its oil flows to the bottom with gravity, these valves are
the ideal shape for mounting diffusion pumps.
Slit Valves Standard Features Options
Sealing Differential 1.5 atm in Either Direction -
Actuation Air to Open, Air to Close Hydraulic, Electric
Shaft Sealing Dual O-ring, 100,000 cycles before service
Edge Welded Bellows, 1 Million Cycles
Lubrication Krytox Grease at Shaft Feedthrough Silicone, Apiezon
Service Life Mechanism Designed for 2 Million Cycles -
Water-Cooling None Gate, Flanges, Body, Guard Ring
Differential Pressure at Opening
1 Torr (1.3 mbar) 760 Torr (1 bar)
Material Aluminum Body, Stainless Steel Mechanism
Stainless Steel, Mild Steel
Surface Finish Jitterbug Anodized, Bead Blasted, Painted
VacuumValves
Vacuum Valve Product Family
www.gnbvac.com9
The specifications for GNB’s angle valves are:
Standard Features Options
Leak Rate <1x10-9 std cc/sec He -
Vacuum Rating <1x10-8 Torr (1.3x10-8 mbar) -
Operating Temperature 400 °F (200°C) High Temperature
Mounting Position Actuator at Top or Bottom Actuator to Side, Low Profile
Required Air Pressure 80-120 psig (5.5-8.3 bar) -
Solenoid Voltage 24VDC 110VAC, 220VAC
Material 304L Stainless Steel 316L Stainless Steel, Mild Steel, Aluminum
Surface Finish Bead Blasted #4 Grained, E-polished, Painted
Position Indicators Reed Switches Mechanical Switches
Type of Seals O-rings at Poppet, Bonnet O-ring at Bellows
Sealing Material Viton A (FKM) Buna, Silicon, FFKM
Sealing Differential 1.0 atm in Either Direction**
Actuation Air to Open Air to Close Hydraulic, Electric
Shaft Sealing Dual O-ring, 100,000 cycles before Service
Edge Welded Bellows, Formed Bellows
Lubrication Silicone Grease at Shaft Feedthrough Krytox, Apiezon
Service Life Designed for 2 Million Cycles*
Water-Cooling None Poppet, Flanges, Body
Differential Pressure at Opening
760 Torr (1 bar)** -
Material 304L Stainless Steel Mild Steel
Surface Finish Bead Blasted Painted
*Under Clean Vacuum Conditions
**For Sizes up to 20 Inches
Special Valves
GNB manufactures a large variety of custom valves for special applications. Examples
include: wedge gate pendulum valves, stainless steel pendulum valves, low particulate
pendulum valves, bodiless valves (insert valves), flapper valves, high temperature
valves, UHV valves, low shock valves, valves rated to over pressure conditions, and
extremely large valves. Please contact GNB for detail for any specialized application.
Vacuum Valve Product Family List
VacuumValves
Stainless Steel Pendulum Valve
Wedge Gate Pendulum valve
Custom Valves
10800-398-8470
VacuumValves
Vacuum Valve Product Family
www.gnbvac.com11
Protective Metal Guard Ring with Water-Cooling
Large Gate Valve
Flapper Valve
VacuumValves
REFERENCE NUMBER
BONNET SEAL
SIZE PORT FLANGE
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
Fin[mm]
Gin[mm]
KGVP-ISOF100T-SBP VITON 4” ISO100 12.31[313.00]
9.06[230.00]
6.88[175.00]
6.03[153.00]
3.02[77.00]
5.06[129.00]
2.50[64.00]
KGVP-ISOF160T-SBP VITON 6” ISO160 16.06[408.00]
11.56[294.00]
8.88[225.00]
9.00[229.00]
3.02[77.00]
5.06[129.00]
2.50[64.00]
KGVP-ISOF200T-SBP VITON 8” ISO200 21.00[533.00]
15.38[391.00]
13.75[349.00]
10.76[273.00]
3.02[77.00]
5.06[129.00]
3.08[78.00]
KGVP-ISOF250T-SBP VITON 10” ISO250 26.19[665.00]
19.13[486.00]
16.25[413.00]
13.21[335.00]
3.85[98.00]
6.57[167.00]
3.34[85.00]
KGVP-ISOF320T-SBP VITON 12” ISO320 31.60[803.00]
23.22[590.00]
20.75[527.00]
16.38[416.00]
3.85[98.00]
6.57[167.00]
4.14[105.00]
Space Saver Gate Valves
ISO 100-320mm
12
Vacuum Gate Valves
800-398-8470
www.gnbvac.com13
Vacuum Gate Valves
Direct Linear Gate Valves ISO 100-320mm
REFERENCE NUMBER
BONNET SEAL
SIZE PORT FLANGE
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
Fin[mm]
Gin[mm]
GVP-ISOF100T-SOP VITON 4” ISO100 11.66[296.16]
8.36[212.34]
6.75[171.45]
6.21[157.73]
3.50[88.90]
11.38[289.05]
2.91[73.91]
GVP-ISOF160T-SOP VITON 6” ISO160 15.81[401.18]
11.31[287.30]
8.88
[225.43]8.03
[204.00]2.71
[68.86]12.74
[323.63]2.50
[63.50]
GVP-ISOF200T-SOP VITON 8” ISO200 20.75[527.05]
15.13[384.18]
13.75[349.25]
10.76[273.00]
3.00[76.00]
15.27[387.76]
3.08[78.00]
GVP-ISOF250T-SOP VITON 10” ISO250 25.82[655.70]
18.75[476.25]
16.25[412.75]
13.29[335.48]
3.00[76.00]
17.24[437.93]
3.34[85.00]
GVP-ISOF320T-SOP VITON 12” ISO320 31.10[789.81]
22.72[577.09]
20.75[527.05]
16.38[415.93]
5.50[139.70]
20.98[533.00]
4.13[105.00]
VacuumValves
VacuumValves
800-398-8470
Vacuum Gate Valves
Direct Linear Gate Valves ISO 400-1320mm
REFERENCE NUMBER
BONNET SEAL
SIZE PORT FLANGE
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
Fin[mm]
Gin[mm]
GVP-ISOF400T-SOP VITON 16” ISO400 38.81[986.00]
28.30[719.00]
23.50[597.00]
20.00[508.00]
5.50[140.00]
23.63
[600.00]
4.14[105.00]
GVP-ISOF500T-SOP VITON 20” ISO500 51.31[1303.00]
37.56[954.00]
27.75[705.00]
24.12[613.00]
5.50[140.00]
29.88[758.00]
4.51[114.00]
GVP-ISOF630T-SOP VITON 24” ISO630 59.69[1516.00]
43.69[1110.00]
34.75[883.00]
30.37[772.00]
7.63[194.00]
33.81[858.84]
5.36[136.00]
GVP-ISOF800T-SOP VITON 32” ISO800 81.00[2057.40]
59.80[1518.90]
45.50[1155.70]
45.30[1150.60]
8.50[215.90]
46.13[1171.58]
8.60[218.40]
GVP-ISOF1000T-SOP VITON 40” ISO1000 92.30[2344.40]
68.10[1729.70]
50.13[1273.18]
53.10[1348.70]
8.50[215.90]
51.13[1298.58]
8.60[218.40]
GVP-ISOF1250T-SOP VITON 50” ISO1250 120.00
[3048.00]
87.80[2230.10]
63.82[1621.03]
67.40[1712.10]
10.40[264.20]
64.63[1641.48]
10.60[269.20]
GVP-ISOF1320T-SOP VITON 52” ISO1320 120.00[3048.00]
87.80[2230.10]
63.82[1621.03]
67.40[1712.10]
10.40[264.20]
64.63[1641.48]
10.60[269.20]
14
www.gnbvac.com15
VacuumValves
Vacuum Gate Valves
Direct Linear Gate Valves ASA14”-52”
High Vacuum Gate Valves Reliable Cycle Life
Low Maintenance
REFERENCE NUMBER
BONNET SEAL
SIZE /PORT FLANGE
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
Fin[mm]
Gin[mm]
VITON/ BUNA
14” 36.77[933.96]
26.27[667.26]
21.80[553.72]
21.00[533.40]
6.92[175.77]
21.96[557.78]
4.62[117.35]
GVP-ASA16-SOP VITON/ BUNA
16” 39.69[1008.00]
27.94[709.50]
23.50[597.00]
20.00[508.00]
5.50[140.00]
23.48[596.39]
4.14[105.00]
GVP-ASA18-SOP VITON/ BUNA
18” 43.44[1103.00]
30.94[785.80]
25.50[648.00]
22.00[559.00]
6.25[159.00]
26.25[688.00]
4.14[105.00]
GVP-ASA20-SOP VITON/ BUNA
20” 50.94[1294.00]
37.19[944.5]
27.75[704.80]
24.12[613.00]
5.50[1.40]
29.88[758.00]
4.51[114.00]
GVP-ASA20D-SOP VITON/ BUNA
21.25” 49.65[1261.11]
35.90[911.86]
27.67[702.82]
27.50[698.50]
8.31[211.07]
30.38[771.65]
6.50[165.10]
GVP-ASA24-SOP VITON/ BUNA
24” 56.41[1432.81]
40.41[1026.41]
35.42[899.67]
32.00[812.80]
9.31[236.47]
33.13[841.50]
6.53[165.86]
GVP-ASA30-SOP VITON/ BUNA
30” 72.93[1852.42]
53.55[1360.17]
43.14[1095.76]
38.75[984.25]
13.44[341.38]
40.75[1035.05]
8.17[207.52]
GVP-ASA36-SOP VITON/ BUNA
36” 83.55[2122.17]
61.05[1550.67]
49.14[1248.16]
45.50[1155.70]
13.44[341.38]
46.13[1171.70]
8.17[207.52]
GVP-ASA40-SOP VITON/ BUNA
40” 93.42[2372.87]
68.05[1728.47]
53.14[1349.76]
50.75[1289.05]
13.62[345.95]
50.88[1292.35]
8.63[219.20]
GVP-ASA48-SOP VITON/ BUNA
48” 109.78[2788.41]
81.44[2068.58]
64.46[1637.28]
59.00[1498.60]
14.59[370.59]
62.11[1577.59]
11.12[282.45]
GVP-ASA52-SOP VITON/ BUNA
52” 119.22[3028.19]
87.72[2228.09]
67.39[1711.71]
63.00[1600.20]
17.57[446.28]
63.26[1606.80]
10.56[268.22]
GVP-ASA14-SOP
Vacuum Gate Valves
VacuumValves
PMG Gate ValvesProtective Metal Guardring
REFERENCE NUMBER
DNin[mm]
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
E1in[mm]
Fin[mm]
Gin[mm]
Hqty/size
Iin[mm]
WTKg/lb
PMGVP-ASA6-SOP 7.0[178.0]
3.6[90.0]
12.0[305.0]
38.9[989.0]
12.9[327.0]
3.5[89.0]
3.8
[95.0]25.2
[640.0]
12.0[304.0]
(8)
3/4-10
9.5[241.0]
59/130
PMGVP-ASA8-SOP 8.0[203.0]
4.3[110.0]
13.5[343.0]
55.3[1406.0]
25.5[648.0]
4.3[108.0]
4.1[105.0]
40.5[1028.0]
13.5[343.0]
(8)
3/4-10
11.8[299.0]
77/170
PMGVP-ASA12-SOP 12.0
[305.0]
4.5[115]
17.8[451]
64.2[1630]
21.3[540]
4.5[114]
4.2[107]
41.8[1061.0]
16.7[425]
(12) 7/16-14
15.6[395]
159/350
PMGVP-ASA14-SOP 14.0
[356.0]
4.6[117.0]
21.8[554.0]
72.4[1839.0]
26.3[667]
4.8[121]
6.9[176]
50.5[1282]
21.0[533]
(12)1- 8
18.8[476]
204/450
PMGVP-ASA20-SOP 20.0
[508.0]
7.4[188]
29.3[743]
109.8[2788]
43.3[1099]
6.8[172]
8.6[ 219]
79.6[2022]
27.5[699]
(20) 25.0[635]
703/1550
PMGVP-ASA24-SOP 24.0[610.0]
10.2[258]
40.5[1029]
145.1[3686]
58.9[1495]
9.5[241]
10.0
[254]106.9[2175]
36.5[927]
(20)
7/8-9
29.5[749]
1814/4000
PMGVP-ASA52-SOP 52.0[1321.0]
12.1
[308.0]76.0
[1930.0]249.4
[6335.0]98.4
[2500.0]12.3 20.6
[524.0]184.7
[4690.0]
65.5[1664.0]
(24)
1.25-7
58.0[1473.0]
5443/12000
16
[311.0]
1.125-7
800-398-8470
www.gnbvac.com17
Vacuum Gate Valves
VacuumValves
Direct Linear Gate ValvesC Style
REFERENCE NUMBER
DNin[mm]
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
E1in[mm]
Fin[mm]
Gin[mm]
Hqty/size
Iin[mm]
WTKg/lb
CGVP-ASA6-SOP 7.00[178]
13.00[330]
18.50[469]
21.90[556]
4.40[111]
4.40[111]
6.80[172]
12.30[311]
11.00[279]
(8) 3/4-10
9.50[241]
30/[66]
CGVP-ASA8-SOP 8.00[203]
16.60[420]
23.30[592]
24.60[624]
4.20[107]
4.20[107]
8.50[215]
13.70[347]
13.50[343]
(8) 3/4-10
11.80[299]
70/[154]
CGVP-ASA10-SOP 12.00[305]
22.60[573]
30.60[776]
31.80[808]
4.30[109]
4.60[117]
9.30[236]
17.80[451]
16.00[406]
(12) 7/8-9
14.30[362]
68/[150]
CGVP-ASA18-SOP 18.00[457]
34.10[865]
46.60[1183]
46.60[1183]
6.60[168]
6.60[168]
12.20[310]
25.80[656]
25.00[635]
(16)1.125-7
22.80[578]
399/[878]
CGVP-ASA20-SOP 20.00[508]
36.50[297]
49.10[1246]
50.20[1275]
7.80[197]
8.50[216]
14.20[361]
27.00[699]
27.50[699]
(20)1.125-7
25.00[635]
344/[757]
CGVP-ASA24-SOP 24.00[610]
45.50[1155.7]
61.50[1562]
61.50[1562]
7.40[189]
8.90[227]
14.40[366]
32.50[826]
32.00[813]
(20)1.125-7
29.50[749]
612/[1346]
CGVP-ASA35-SOP 35.00[889]
61.70[1567]
84.20[2138]
84.20[2138]
8.80[224]
12.10[308]
20.30[515]
49.80[1264]
45.00[1143]
(28) 3/4-10
38.50[978]
1814/[3991]
VacuumValves
REFERENCE NUMBER SEAL
SIZE Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
SVP-50x500D-AL VITON 2x20 3.58[90.93] 9.50[241.30] 19.63[498.60] 26.64 [676.66] 4.37[111.00]
SVP-50X711D-AL VITON 2x28 3.58[90.93] 9.50[241.30] 19.63[498.60] 36.04[ 915.42] 4.37[111.00]
SVP-50X1143D-AL VITON 2x45 3.83[97.28] 9.50[243.10] 19.88[504.95] 53.89[1368.81] 4.37[111.00]
SVP-50X1550D-AL VITON 2x61 3.83[97.28] 9.50[243.10] 19.88[504.95] 70.69[1795.53] 4.97[126.24]
SVP-50X2350D-AL VITON 2x92.5 3.83[ 97.28] 9.50[243.10] 19.88[504.95] 103.77[2635.76] 4.97[126.24]
SVP-100X500D-AL VITON 4x20 4.66[118.36] 18.50[469.90] 31.13[790.70] 26.72[678.69] 5.37[136.40]
SVP-100X711D-AL VITON 4x28 4.66[118.36] 18.50[469.90] 31.13[790.70] 36.12[917.45] 5.37[136.40]
SVP-100X1143D-AL VITON 4x45 5.16[131.06] 18.50[469.90] 31.63[803.40] 53.97[1370.84] 5.37[136.40]
SVP-100X1550D-AL VITON 4x61 5.16[131.06] 18.50[469.90] 31.63[803.40] 70.77[1797.56] 5.37[136.40]
SVP-100X2350D-AL VITON 4x92.5 5.16[131.06] 18.50[469.90] 31.63[803.40] 103.85[2637.79] 5.37[136.40]
SVP-150X500D-AL VITON 6x20 5.74[145.80] 22.50[571.15] 37.63[955.80] 54.05[1372.87] 5.87[149.10]
SVP-150X711D-AL VITON 6x28 5.74[145.80] 22.50[571.15] 37.63[955.80] 70.85[1799.59] 5.87[149.10]
SVP-150X1143D-AL VITON 6x45 6.24[158.50] 22.50 37.63[955.80] 54.05[1372.87] 5.87[149.10]
SVP-150X1550D-AL VITON 6x61 6.24[158.50] 22.50[571.15] 37.63[955.80] 70.85[1799.59 5.87[149.10]
SVP-150X2350D-AL VITON 6x95.5 6.24[158.50] 22.50[571.15] 37.63[955.80] 103.93[2639.82] 5.87[149.10]
SVP-50X500D-AL VITON 8x20 6.82[173.23] 30.30[769.62] 48.28[1226.31] 26.95[684.53]
SVP-200X711D-AL VITON 8x28 6.82[173.23] 30.30[769.62] 48.28[1226.31] 36.35[923.29] 5.87[149.10]
SVP 200X1143D-AL- VITON 8x45 7.32[185.93] 30.30[769.62] 48.28[1226.31] 54.20[1376.68] 6.56[166.62]
SVP-200X1550D-AL VITON 8x61 7.32[185.93] 30.30[769.62] 48.28[1226.31] 71.00 [1803.40] 6.56[166.62]
SVP-200X2350D-AL VITON 8x92.5 7.32[185.93] 30.30[769.62] 48.28[1226.31] 104.80[2661.92] 6.56[166.62]
[571.15]
18
Slit Valves
5.87[149.10]
BONNET
800-398-8470
www.gnbvac.com19
VacuumValves
Angle ValveISO 100-320mm
High Vacuum Gate Valves Reliable Cycle Life
Low Maintenance
REFERENCE NUMBER
BONNET SEAL
SIZE PORT FLANGE
ROUGHING PORT
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
E
in[mm]F
in[mm]
AVP-ISOK100-SBP VITON 4” ISO100 N/A 4.25[107.95]
8.74[222.00]
12.72[323.09]
6.26[159.00]
6.50[165.1]
3.94[100.08]
AVP-ISOK160-SBP VITON 6” ISO160 KF40 5.43[137.92]
11.34[288.04]
17.40[441.96]
8.62[218.95]
8.86[225.04]
6.3[160.02]
AVP-ISOK200-SBP VITON 8” ISO200 KF50 7.87[199.90]
14.49[368.05]
21.32[541.53]
10.75[273.05]
11.22[284.99]
7.87[199.90]
AVP-ISOK250-SBP VITON 10” ISO250 ISO63 8.19[208.03]
17.00[431.80]
29.17[740.92]
12.99[329.95]
13.19[335.03]
9.84[249.94]
AVP-ISOK320-SBP VITON 12” ISO320 ISO80 9.84[249.94]
20.31[515.87]
32.48[825.00]
15.75[400.05]
16.73[424.94]
12.60[320.04]
Angle Valves
VacuumValves
ISO 400-630
REFERENCE NUMBER
BONNET SEAL
SIZEFLANGE
Ain[mm]
A1in[mm]
Bin[mm]
Cin[mm]
D
in[mm]E
in[mm]
F
in[mm]
AVP-ISOF400-SOP VITON 16” ISO400 13.78[350.01]
9.69[246.13]
19.56[496.82]
30.55[775.97]
20.50[520.70]
20.10[510.54]
15.67[398.02]
AVP-ISOF500-SOP VITON 20” ISO500 14.57[370.08]
12.46[316.48]
24.56[623.82]
39.86[1012.44]
25.50[647.70]
24.00[609.60]
19.67[499.62]
AVP-ISOF630-SOP VITON 24” ISO630 17.50[444.50]
17.50[444.50]
33.31[846.07]
63.88[1622.55]
31.19[792.23]
29.53[750.06]
25.06[636.52]
AVP-ISOF800-SOP VITON 32” ISO800 24.00[609.60
23.63[600.20]
46.75[1187.45]
90.00[2286.00]
44.00[1117.60]
36.22[919.99]
31.50[800.10]
AVP-ISOF1000-SOP VITON 40” ISO1000 27.17[690.12]
23.04[585.22]
47.07[1195.58]
69.75[1771.65]
49.41[1255.01]
44.09
[1119.89]
39.37[1000.00]
ASA 14-24
REFERENCE NUMBER
BONNET SEAL
SIZE PORT FLANGE
Ain[mm]
A1in[mm]
B
in[mm]
C
in[mm]
D
in[mm]
Ein[mm]
F
in[mm]
AVP-ASA14-SOP VITON 14” ASA14 12[304.80]
8.25[209.55]
17.09[434.09]
36.22[919.99]
20.50[520.70]
19.88[504.95]
14[355.60]
AVP-ASA16-SOP VITON 16” ASA16 14[355.60]
9.25[234.95]
19.13[485.90
38.50[977.90]
22.75[577.85]
23.50[596.90]
16[406.40]
AVP-ASA18-SOP VITON 18” ASA18 14[355.60]
10.31[261.87]
21.13[536.70]
42.26[1073.40]
22.50[571.50]
23.50[596.90]
18[457.20]
AVP-ASA20-SOP VITON 20” ASA20 16[406.40]
14.00[355.60]
27.43[696.72]
56.38[1432.05]
27.41[696.21]
27.50[698.50]
20.50[520.70]
AVP-ASA24-SOP VITON 24” ASA24 19[482.60]
17.50[444.50]
33.31[846.07]
63.88[1622.55]
30.75[781.05]
28.50[723.90]
24.00[609.60]
AVP-ASA35-SOP VITON 35” ASA35 24[609.60]
23.63[600.20]
46.75[1187.45]
90.00[2286.00]
44.00[1117.60]
41.75[1060.45]
35.00[889.00]
Angle Valve ISO/JAS/ASA 14”-40”
20
Angle Valves
PORT
800-398-8470
www.gnbvac.com21
CryoProducts
Cryo Products Family
The product families are: Baffles, Liquid Nitrogen Traps, and Cryo-coils
Primary Uses of Cryo Products
There are 4 primary uses of baffles and other cryo products:
1. Trapping contaminants. As oil, water, selenium, and other contaminants travel in avacuum system, they will stick to cold surfaces. Cooled baffles provide cold surfacesthat can trap the contaminants, thus protecting the process or components fromcontamination.
2. Heat shields. Processes may be hot, yet many vacuum components do not toleratehigh temperatures. A baffle will protect cryo-pumps and other components from heatby absorbing the heat load.
3. Diffusing gasses. A diffuser controls the movement of gasses in a vacuum systemduring pump-down or venting by changing the speed and direction of moving gasses.
4. Moisture Removal. Baffles can be used to increase pumping speeds by removingthe moisture (humidity) from the air in the chamber. As cryo-coils and bafflescondense the water vapor out of the air, they remove the water vapor load from thepumps and increase pumping speed.
Conductance
Because a baffle adds restriction between the pump and the vacuum chamber, it may reduce the ability of the pumping system. This reduction in conductance depends on a large number of factors such as the pressure in the vacuum system (molecular vs. laminar flow), the type of gas and the temperature of the baffle.
In the high vacuum range, an optically dense chevron style baffle that is placed between a chamber and a vacuum pump will reduce the pumping speed by roughly 50%. However, if its surface temperature is cold, it will also increase the pumping speed of the system because it will pull water vapor out of the system. The interacting factors make it difficult to calculate the overall pumping speed. For example, testing that was completed on an actual production system showed that removing a diffusion pump cold head and replacing it with GNB's chevron style baffle only reduced the pumping speed by 13% while decreasing oil backstreaming by 94%.
Instructions for Using Baffles
1. A baffle must always have an unrestricted exit line. If the exit is blocked and thebaffle is allowed to warm, the expansion of the liquid and/or gas inside can causedangerous pressures to develop.
2. A baffle should not be positioned above a turbo pump or other equipment thatcannot tolerate water. When a baffle warms, moisture may drip from it.
CryoProducts
Cryo Products Family
3. A baffle or trap should not be used for applications that generate large amounts of vapors that will condense at the temperature of the baffle. When this is the
case, the baffle will "ice" quickly and become ineffective. 4 A baffle should not be used if the conductance of the pumps is marginal. A baffle
that is placed in front of a pump may reduce the pumping speed. 5 Baffles and cryo-coils should be used with caution whenever they are exposed to
a hot process. Although the initial pump-down time can be shortened, the hot process may free the trapped moisture and increase the gas load while the process is hot. You may consider hiding the baffle behind a heat shield or valve while the process is hot.
Multi-coolant Baffles
GNB’s baffles are also called multi-coolant baffles because they can be chilled by a variety of liquids. While they are often used in conjunction with a chiller, they can be used with cool water, liquid nitrogen and other liquids. Their most common use is to trap contaminates in a vacuum system. One such contaminant is oil from a diffusion pump. In the high vacuum range, molecules of diffusion pump oil can wander from the pump and contaminate the vacuum process. With GNB’s 5-bounce design, these oil molecules are trapped and then drip harmlessly back into the pump. The specifications for GNB’s baffles are as follows:
Specification Standard Features Options
Leak Rate <1x10-9 std cc/sec He -
Vacuum Rating 1x10-8 Torr (1.3x10-8 mbar) -
Body Material 304 Stainless Steel -
Chevron Material Copper Aluminum, Stainless
Surface Finish Bead Blasted -
Seals Viton A (FKM) Silicone, Buna
Liquid Nitrogen Traps
Liquid Nitrogen Traps (LNTs) are similar to baffles; however, they also have a built-in reservoir to hold liquid nitrogen. For this reason, they must be designed and used for a specific orientation with respect to gravity. The reservoir provides a supply of LN2 that can last up to 12 hours. They must be periodically refilled. Equipment and accessories are available for automatic refilling if desired. The specifications for LNTs are:
Specification Standard Features Options
Leak Rate <1x10-9 std cc/sec He -
Vacuum Rating 1x10-8 Torr (1.3x10-8 mbar) -
Body Material 304 Stainless Steel -
Chevron Material Copper Stainless
Surface Finish Bead Blasted -
Seals Viton A (FKM) Silicone, Buna
22800-398-8470
www.gnbvac.com23
CryoProducts
Cryo Products FamilyCryo-coils
Cryo-coils are used to rapidly reduce the pressure inside a vacuum system. They use the same principle as a cryo-pump: they create a vacuum by freezing the water and other molecules. Another name for a cryo-coil is Meissner coil. Cryo-coils provide one of the fastest vacuum pumping methods because just as fast as a surface inside a vacuum chamber can be made cold, the vacuum pressure can be reduced.
Water vapor is 65% to 95% of the gas load in most vacuum systems. A cryo- coil freezes the water vapor and can reduce the pump-down time by 25% to 75%. The following chart shows the water vapor partial pressure according to temperature. The colder the cryo- coil the lower the expected vacuum pressure.
Desired Pressure Vacuum Avg Cryosurface
Temp Needed Torr mbar ºC ºF
5 x 100 6.7 x 100 -25.4 -13.72 2 x 100 2.7 x 100 -34.4 -29.92 1 x 100 1.3 x 100 -40.8 -41.44 5 x 10-1 6.7 x 10-1 -46.8 -52.24 2 x 10-1 2.7 x 10-1 -54.3 -64.74 1 x 10-1 1.3 x 10-1 -59.7 -75.46 5 x 10-2 6.7 x 10-2 -64.8 -84.64 2 x 10-2 2.7 x 10-2 -71.2 -96.16 1 x 10-2 1.3 x 10-2 -75.8 -104.44 5 x 10-3 6.7 x 10-3 -80.1 -112.18 2 x 10-3 2.7 x 10-3 -85.6 -122.08 1 x 10-3 1.3 x 10-3 -89.6 -129.28 5 x 10-4 6.7 x 10-4 -93.4 -136.12 2 x 10-4 2.7 x 10-4 -98.2 -144.76 1 x 10-4 1.3 x 10-4 -101.6 -150.88 5 x 10-5 6.7 x 10-5 -104.9 -156.82 2 x 10-5 2.7 x 10-5 -109.1 -164.38 1 x 10-5 1.3 x 10-5 -112.2 -169.96 5 x 10-6 6.7 x 10-6 -115.1 -175.18 2 x 10-6 2.7 x 10-6 -118.1 -180.58 1 x 10-6 1.3 x 10-6 -121.5 -186.70 5 x 10-7 6.7 x 10-7 -124.1 -191.38 2 x 10-7 2.7 x 10-7 -127.5 -197.50 1 x 10-7 1.3 x 10-7 -129.9 -201.82 5 x 10-8 6.7 x 10-8 -132.2 -205.96 2 x 10-8 2.7 x 10-8 -135.2 -211.36 1 x 10-8 1.3 x 10-8 -137.3 -215.14 5 x 10-9 6.7 x 10-9 -139.5 -219.10 2 x 10-9 2.7 x 10-9 -142.1 -223.78 1 x 10-9 1.3 x 10-9 -144.1 -227.38
I
O
24
CryoProducts
800-398-8470
REFERENCE NUMBER
SIZE PORT SIZE
Ain[mm]
Bin[mm]
Cin[mm]
Din[mm]
Ein[mm]
Fin[mm]
Gin[mm]
Hin[mm]
Jin[mm]
K
CMCB-ISO100-S 4” ISO100 5.92[150.00]
6.06
[154.00]
6.81[173.00]
2.0[51.00]
6.44[164.00]
4.48[114.00]
1.0
[25.00]
1.0
[25.00]
12.88
[327.00]
8.97
[228.00]
CMCB-ISO160-S 6” ISO160 7.88[200.00]
8.13
[207.00]8.69
[221.00]2.0
[51.00]7.44
[189.00]5.42
[138.00]1.0
[25.00]1.0
[25.00]14.88
[378.00]
10.85[276.00]
Conical- shaped Multi Coolant Baffle
GNB Custom Baffles
Selenium TrapISO 630 Conical Baffle
in[mm]
www.gnbvac.com25
I
O
CryoProducts
Flange Dimension- Inches[mm] LNT Dimensions-Inches[mm] Reservoir Approx
Model Opening ID
Width O-Ring Groove
Bolt Circle
Hole Size
Hole Size A B C D Volume Liters
WT(lb)
ID x C/S E F
LNT-ASA3T-SC 3.00 7.50 3.50 [88.9] 4.75 (4) (4) 16.13 19.88 6.00 5.75 4.94 60
[76.2] [190.5]
Slots
LNT-ASA4T-SC 4.00 9.00 5.25 [133.4] 7.50 (8) (8) 12.13 16.63 5.00 4.20 2.65 60
[101.6]
Slots
LNT-ASA8T-SC 8.00 13.50 8.50 [215.9] 11.75 (8) (8) 16.31 23.06 5.00 7.88 5.71 80
.781 [19.8]
Thru
LNT-ASA10T-SC 10.00 16.00 12.50 [317.5] 14.25 (12) 23.75 31.75 5.00 7.88 9.86 120
LNT-ASA12T-SC 12.00 19.00 13.25 [336.6] 17.00 (12) (12) 23.75 33.25 5.00 7.88 9.86 120
LNT-ASA16T-SC 16.00 23.50 16.56 [427.7] 21.25 (16) (16) 30.00 41.75 7.06 8.41 17.70 180
1.03 [26.2]
LNT-ASA20T-SC 20.00 27.50 20.56 [522.2] 25.00 (20) (20) 28.00 41.75 7.00 11.00 28.70 385
1.25 [31.8]
LNT-ASA35T-SC 35.00 41.75 35.50 [901.7] 38.50 (28) (28) 46.31 67.19 7.00 12.00 59.00 1300
88 [22.4]
Liquid Nitrogen Traps
(12)
.656 [16.7]
.75 [19.1]
x1/8
x1/4
x1/4
x1/4
x1/4
x1/4
x3/8
x3/8
[228.6]
[203.2] [324.9]
[254.0] [406.4]
[304.8] [482.6]
[406.4] [596.9]
[508.0] [698.5]
[889.0] [1060.5]
Thru
Thru
Thru
Thru
.906[23.0]
Thru
.906[23.0]
[120.7]
[190.5]
[298.5]
[362.0]
[431.8]
[539.8]
[635.0]
[977.9]
5/8-11
5/8-11
3/4-10
7/8-9
7/8-9
1-8
1.1257
3/4-10
[409.7]
[308.1]
[414.3]
[603.2]
[603.2]
[762.0]
[711.2]
[1176.3]
[505.0]
[422.4]
[585.8]
[806.4]
[844.5]
[1060.5]
[1060.5]
[1706.5]
[152.4]
[127.0]
[127.0]
[127.0]
[127.0]
[179.4]
[177.8]
[177.8] [304.8]
[279.4]
[213.5]
[200.0]
[200.0]
[200.0]
[106.7]
[146.0]
CryoProducts
26800-398-8470
FLANGE TYPE Flange Dimension- Inches[mm] Baffle Dimensions - Inches [mm]
Model Opening ID A
O- ring GrooveID BxC/S
BoltCircle
Hole Size C D E F G H Fitting
MCB-ASA6T-SC 7.50[190.5]
8.00 9.50[241.3]
.78[19.8]
11.00[279.4]
3.29[83.6]
12.00[304.8]
9.00[228.6]
7.00[177.8]
1.65[41.8]
3/8 VCR 30
MCB-ASA8T-SC 8.00[203.2]
9.25
[203.2]x3/16
11.75[298.5]
.78[19.8]
13.50[342.9]
3.50[88.9]
12.00[304.8]
9.00[228.6]
7.00[177.8]
1.65[41.8]
3/8PARKER
30
MCB-ASA10T-SC(ISO 250)
10.28[261.1]
11.00 12.205[310.0]
.44[11.0]
13.189[335.0]
3.63[92.2]
13.25[336.6]
10.63[270.0]
8.17[207.5]
1.61[41.0]
3/8NPTF
40
MCB-ASA12T-SC 12.25[311.1]
12.50[317.5]x3/16
17.00[431.8]
.88[22.4]
19.00[482.6]
2.88[73.0]
13.25[336.6]
10.63[270.0]
8.25[209.6]
1.45[37.0]
3/8 VCR 50
MCB-ASA20T-SC 21.75[552.5]
22.12.
[561.9]x1/425.00
[635.0]1 .25[31.8]
27.50[698.5]
3.94[100.1]
20.75[527.1]
17.75[450.9]
14.25[362.0]
1.75[44.3]
1/2PARKER
90
RING TYPE Baffle Dimensions- Inches [mm]
D E F G H Fitting
MCB-RASA6-SC 7.50 [190.5] 8.00[203.2]x3/16
8.50 [215.9] 2.82[71.5]
7.75[196.9]
5.00[127.0]
3.00[76.2]
1.40[35.4]
3/8 VCR 30
MCB-RASA8-SC 8.00 [203.2] 8.15 [207.0]x1/8
8.63 [219.1] 2.63[66.7]
7.69[195.3]
5.00[127.0]
3.00[76.2]
1.30[32.9
3/8PARKER
30
MCB-RASA12-SC 12.25 [311.1]
12.50 [317.5]x3/16
13.25[336.6]
2.88[73.0]
6.62[168.3]
5.00[127.0]
2.60[66.0]
1.42[36.1]
3/8PARKER
50
MCB-RASA16-SC 18.00 [457.2]
18.31 [465.2]x1/4
19.63[498.6]
4.00[101.6]
10.97[278.6]
8.38[212.8]
3.00[76.2]
1.75[44.3]
1/2PARKER
92
MCB-RASA20-SC 21.75 [552.5]
22.12 [561.9]x1/4
23.00[584.2]
3.94[100.1]
9.25[235.0]
6.50[165.1]
3.00[76.2]
1.75[44.3]
1/2PARKER
90
MCB-RASA24-SC 24.00 [609.6]
25.06 [636.5]
x1/426.00
[660.4]3.94
[100.1]9.25
[235.0]6.25
[158.8]2.75[69.9]
1.75[44.3]
1/2PARKER
150
MCB-RASA32-SC 32.50 [825.5]
32.81 [833.5]x1/4
33.75[857.3]
5.25[133.4]
8.50[215.9]
6.50[165.1]
2.00[50.8]
2.38[60.3]
1/2PARKER
175
MCB-RASA35-SC 35.50 [901.7]
35.81 [909.6]x1/4
36.75[933.5]
5.25[133.4]
10.00[254.0]
7.00[177.8]
3.00[76.2]
2.38[60.3]
1/2PARKER
310
[235.0]x1/4
Multi- Collant Baffles
Model Opening ID A Groove
ID BxC/S
ringO-
ApproxWT(lb)
ApproxWT(lb)
OD C
[279.4]x1/4
Multi- Coolant Baffles
www.gnbvac.com27
Vacuum Chamber
The product families are: UHV Chambers, HV Chambers, Rough Vacuum Chambers
and Pressure Vessels.
Introduction to Chambers
A chamber creates an enclosed space for a controlled environment. Inside the
chamber the pressure can be low or high. If the pressure is lower than the atmospheric
pressure it is called a vacuum chamber, and if it is higher than atmospheric pressure it
is a pressure vessel.
The key challenge is to create a design that will withstand the forces created by these
pressure differences. A spherical shape is the best to manage these forces, but often it
is not a practical shape to contain an object or a process. Consequently, cylindrical, D-
shaped, and rectangular shapes are commonly used.
Vacuum chambers have a special requirement of creating an environment with a
smaller number of air molecules. Some molecules are in the chamber before the
pumping process begins, others find their way into the chamber (permeation) through
the materials that are used to construct the chamber. To reach a higher vacuum level
(lower absolute pressure), special considerations must be taken to ensure the vacuum
chamber has a low gas load. The higher the vacuum, the more stringent the
requirements are in order to keep the number of free gas molecules low.
Although there are no absolute technical definitions for the different vacuum ranges, the
gas flow properties change as the vacuum level increases. In common practice, the
rough vacuum range is between 7.5 Torr (10 mbar) to 7.5x10-4 Torr (1x10-3 mbar), the
high vacuum ranges is 7.5x10-4 Torr (1x10-3 mbar) to 7.5x10-9 Torr (1x10-8 mbar), and
the ultra-high vacuum range is a pressure less than 7.5x10-9 Torr (1x10-8 mbar).
Primary Uses of Chambers
Chambers have a wide range of uses. Some of the common ones are: packaging and
food processing, freeze drying, sterilization, semiconductor manufacturing, vapor
deposition coatings, refractory metal processing, heat treatment processing, crystal
growing, autoclaves, space simulation and bulk storage for gasses. The common
feature in all of these processes is the need to have a controlled environment where air
is not allowed in and the gas (if any) inside the chamber is not allowed out.
The design and materials of a chamber are determined by its pressure rating. For this
reason we categorize chambers into UHV Chambers, HV Chambers, Rough Vacuum
Chambers and Pressure Vessels.
Chamber Family List
VacuumChamber
800-398-8470
UHV Chambers
To achieve an ultra-high vacuum level, the chamber should not have O-ring or
elastomer seals. Only metal seals can be used. The chamber should have special
surface preparations (mechanically polished or electropolished) and it must be made
from only UHV rated materials such as aluminum or stainless steel.
UHV Chambers must be made from materials that have low outgassing rates. Most
materials have gas molecules or volatile compounds at or below their surfaces. The
ability of these molecules to leave the surface and become a free gas molecule inside
the vacuum chamber is called the outgassing rate. Adsorption is the ability of a gas,
liquid or dissolved solid to adhere to the surface of the chamber. When the pressure
inside the chamber is decreased, these molecules can leave the surface (desorption)
and contribute to the gas load. Water and hydrocarbon molecules can evaporate and
add to the gas load. For these reasons, the vacuum chamber must have a surface
preparation that limits the number of molecules that will leave, and it must be cleaned to
remove contaminants.
A bakeout is the process that heats the chamber walls to intentionally energize the
molecules at the surface of the chamber to allow them to break free. This will make it
easier to evacuate the chamber to an ultra-high vacuum level. Sometimes a Residual
Gas Analyzer (RGA) is used in the chamber to determine the composition of the
remaining gas molecules. For example, an RGA could be used to show that the
chamber has a minimal amount of hydrocarbons—indicating the chamber is clean and
ready for use in UHV processes. The following specifications are relevant to UHV
chambers.
28
Chamber Family List
www.gnbvac.com29
VacuumChamber
Chamber Type: Sphere, D-Shape, Cylinder, Box Pressure Range <7.5x10-9 Torr (1x10 -8 mbar)
Seal Type Conflat, Wire Seal Material Copper, Silver, Aluminum Chamber Material 304L, 316L, Aluminum Surface Finish 2B, #4 Grained, Electropolished, Polished
Cleaning Pristine for UHV Bakeout Optional upon Request
RGA Optional upon Request
Packaging Double Bagged and Back Filled with Dry Nitrogen or Shipped under Vacuum
HV Chambers
There is a wide range of possibilities for vacuum chambers between the absolute
pressure range of 7.5x10-4 Torr (1x10-3 mbar) to 7.5x10-9 Torr (1x10-8 mbar). At higher
pressures, many materials can be used including mild steel, stainless steel, Teflon®,
PEEK, polycarbonate, and aluminum. At lower pressures, (higher vacuum) the choice
of materials is limited until only those that are UHV compatible may be used. The
same is true of seals. At higher pressures, silicone, Viton® A (FKM), Buna,
polyurethane, and other elastomers may be used. At lower pressures, fewer materials
can be used, and for elastomers to be used there should be dual O-rings with a
vacuum pumping port between them. The specifications for HV chambers are as
follows.
Chamber Type: Sphere, D-Shape, Cylinder, Box
Pressure Range 7.5x10-4 Torr (1x10-3 mbar) to 7.5x10-9 Torr (1x10 -8 mbar)
Seal Type ASA, ISO, Conflat
Seal Material Many Elastomers and Metal, FKM is Common
Chamber Family List
800-398-8470
VacuumChamber
Chamber Material 304L, 316L, Aluminum, Mild Steel, Polycarbonate Surface Finish No specific requirements Cleaning Cleaned for Vacuum Bakeout Not Applicable RGA Not Applicable Packaging Wrapped in Plastic, Foil or Shrink Wrap
Rough Vacuum Chambers
In the pressure range between an absolute pressure of 7.5 Torr (10 mbar) to 7.5x10-4
Torr (1x10-3 mbar), numerous materials may be used. Any nonporous material that
does not readily allow air molecules to pass through may be considered. Mild steel is
common because it has the required structural rigidity, and it is less expensive than
many other materials. The specifications for a rough vacuum chamber are as follows.
Chamber Type: Sphere, D-Shape, Cylinder, Box
Pressure Range 7.5 Torr (10 mbar) to 7.5x10 -4 Torr (1x10 -3 mbar)
Seal Type ASA, ISO, ANSI B 16.5
Seal Material Many Elastomers and Metal, Buna is Common
Chamber Material Mild Steel, 304L, Many Nonporous Materials
Surface Finish Bead Blasted, Painted
Cleaning Generally Clean
Bakeout Not Applicable
RGA Not Applicable
Packaging Wrapped in Plastic, Tarped
30
Chamber Family List
www.gnbvac.com31
VacuumChamber
Pressure Vessels
GNB has an ASME pressure vessel certification (U-stamp), and is qualified to
manufacture pressure vessels. Any vessel that is subjected to a differential pressure
greater than 15 psi and is 6 inches or larger in diameter should be designed and
manufactured in accordance with the ASME section VIII code.*
For safety, some customers choose to have vacuum chambers built in accordance with
the ASME code even though the pressure differential is only 15 psi. Other vacuum
chambers have a dual purpose such as a vacuum heat treatment furnace. For example,
these chambers can be evacuated with a vacuum pump and then backfilled with an
inert gas at a positive pressure during the heat treatment process.
Pressure vessels are used in numerous applications apart from the vacuum industry:
diving cylinders, water pressure tanks, distillation towers, autoclaves, pneumatic storage
tanks, hydraulic accumulators, and bulk storage tanks for compressed gasses are a few
examples. The specifications for GNB’s pressure vessels are as follows:
Chamber Type: Pressure Vessel
Sphere, Cylinder, Box
Pressure Range -14.7 psig to 3000 psig Seal Type ANSI B 16.5 Seal Material O-rings, Flat Gaskets, Backing Rings Chamber Material Mild Steel, 304L, 316L Surface Finish Bead Blasted, Painted Cleaning Generally Clean Bakeout Not Applicable RGA Not Applicable Packaging Wrapped in Plastic, Tarped
*This code is applicable in the United States and there are a few exceptions such as
water heaters and internal pressure pump components.
Chamber Family List
800-398-8470
GNB is highly experienced at making products for the metallurgical industry.
Below are examples.
· Material: Stainless Steel or Mild Steel
· Actuation: Hydraulic, Pneumatic, Electric
· Cooling: Water-cooled Gates, Guard Rings, Flanges and Bodies
· Engineering: Retrofit Existing Systems with Feeders, Valves, Cranes and
Mezzanines
· Valve Types: Circular, Rectangular, Slit,Flapper and Bodiless
Gate Valve with internal Flapper Valve. Allows internals to beremoved and cleaned while under vacuum.
Vibratory Feeder Chambers and Systems
32
Metallurgical Products and Applications
Large PMG Valve
Large Vacuum Chamber
Water-cooled Protective Guard Ring Valve
CustomProducts
I
O
www.gnbvac.com33
Short Lead Times Competitive Pricing
Vibratory Feeder Chambers and Systems
Free Consulting on Chambers
In-line Chamber & Valves
UHV ChamberIn-line Chamber & Valves
Aluminum ChamberBodiless Valves Integrated into Chamber
CustomProducts
I
O
CustomServices
800-398-8470
Custom Services & ManufacturingGNB’s capabilities extend beyond manufacturing catalog components. Engineering,
welding, machining and project management are all core competencies. Some other
customer services and manufacturing capabilities GNB offers are:
Custom Engineering:
Flow, heat transfer, stress and conductance calculations are available upon request.
Rebuild Services:
GNB will rebuild and modify vacuum valves from many manufacturers.
Vibratory Stress Relief:
To acheive dimensional stability, GNB has the ability to vibratory stress relieve all sizes
of products.
GNB Manufacturing
GNB Corporation has over 45 years of manufacturing excellence in the Vacuum
Science Industry. In those years, we’ve manufactured thousands of custom chambers
and valves of varied materials. Our manufacturing expertise coupled with years of
engineering knowledge and state-of-the-art equipment delivers uncompromised quality
to each project. Take a moment to review our resources and let us know how we can
add value to your next project.
Manufacturing Summary
CNC Milling: Capability to: 168”sq. (4267mm sq.)
Turning: Capability to: 108” (2743mm)
Cutting: 5 Axis Waterjet 12ft. x 8ft. (3657mm x 2438mm)
Saw: 13” (330mm)
Blasting: Walk-In Cabinet, 15ft. x 12ft. x 12ft.
(4572mm x 3657mm x 3657mm)
Lifting Capacity: 30 Tons (27 Metric Tons)
• 15 Weld Stations
• MIG & TIG Welding, Materials: Aluminum,
• Stainless Steel, Mild Steel
• AWS CWI on Staff
• ASME U-Stamp
34
www.gnbvac.com35
I
O
The example shown is a standard GNB Corporation gate valve with:
•16 inch aper ture clearance
•Electro pneumatic actuation•304 stainless steal composition•
It has the following options: •Position indicator•O-ring groove in the second flange
When ordering this valve , the GNB model number becomes the follo wing:
•Space Saver style gate valve
De
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Pro
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Actu
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Fla
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Op
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Options
Roughing portWater cooled gateWater cooled body Water cooled flange
BodilessClean out ports Second o-ring groove Flange: ASA, ISO, CF, KF,orCustom Design
K GV P ISOF400 T M S O P-X
Design Type
KHDGPPMGRT
AVGVFVSV
Space SaverHeavy Duty GatePendulumProtective Metal Guard RingRoughingThroftling
AngleGate ValveFlapper ValveSlit Valve
Actuatio nCEHMLPW
Rotary PneumaticElectricHydraulic
Manual Level Pneumatic Hand wheel
MaterialAMS
Aluminum Mild steel304L Stainless Steel
Shaf t SealB O
Bellows
A complete written description of any options required on all purchase orders.
|| || | | | | | |
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O-ring shaft seal
Product Type
Ordering Information
O-ring
||
Copy right © 2016-06 GNB Corporation. All rights reserved.
Rev ision: August 2016
GNB Corporation3200 Dwight Rd, Suite 100
Elk Grove, CA, USA 95758
Phone: (916)395-3003
Fax: (916)395-3363
Email:
www.gnbvac.com | www.vacuumbaffles.com
Toll- Free:1-800-398-8470